I was leaning more towards a cheaper sub and getting twice as many. My initial budget might be $1500 if I'm lucky, but I'll plan to add a couple or more each year over time until I'm happy.

The idea of doing a riser horn under the second row I'm not sure about.

Ideally I'd only need about 4 subs 18" sealed to get me flat to 15hz and the level I would listen at (reference or less).

But I'd want something excessive to show off or just experience and smile from time to time, and for music and parties. There's a full bar in my plan and it's going to be an entertainment space. I don't need flat to 15hz though. Flat to that low (or lower) at say 135db isn't needed, but I'd like to hit 30hz to 80hz that loud for music.

Perhaps I'll do a few horns but turn them off for reference quality movie watching - and just tune the room and system without them for great movie audio. If I want to get silly I can just turn them on.

Would that make any sense? Or am I crazy ?

My room is going to have less cabin gain for being so large.

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"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."

Flat to that low (or lower) at say 135db isn't needed, but I'd like to hit 30hz to 80hz that loud for music

Full blown concert touring sound doesn't go that loud. 120dB, max, and that's painfully loud. And that's assuming the venue allows it that loud. Most don't, rightfully concerned about being sued for causing hearing damage to the audience.

Cliffnotes:
It is easily done if you select the correct phased hpf slope.

Honestly, my two ported caps have more output than I ever use. People on this forum sometimes ask why I don't scoop up another pair of used caps next (instead of buying the eight ultimax for my nice veneer sealed enclosures) - well that is why.

So if you are doing the infinity column smoothing subs, you might just start with two of the uxl-18 ported subs, or two ghorns. Either way is already a tremendous amount of bass! The two caps are capable of low 130 dB range for music listening at seating position and you just don't go there too often. I've owned my caps since mid 2011, and they still make me giddy when I demo them for guests at reference level volumes. In all the demos I've given I've never once had someone tell me they crave more bass than I can dish out. Not even pennynike1. Instead the two subs are always the star of the show.

Sounds like your getting close to a decision, and a good one! Enjoy the setup!

How about 24 1260 in ported box tuned to 23hz. Giving each sub 3cubic feet and 3inuke6k that's $750 on subs 1200 on amps. Wood probably be 6 sheets mdf so a few hundred more. Or another 8 more subs and 1 more amp. 32 12" subs 4 inuke6k you have mini dap so no need first the 6kdsp save $200 $2400 total + wood.

How about 24 1260 in ported box tuned to 23hz. Giving each sub 3cubic feet and 3inuke6k that's $750 on subs 1200 on amps. Wood probably be 6 sheets mdf so a few hundred more. Or another 8 more subs and 1 more amp. 32 12" subs 4 inuke6k you have mini dap so no need first the 6kdsp save $200 $2400 total + wood.

That 23hz tune with those subs give you the best output except in that 20hz zone, above 20 its excellent and darn loud. Also in a smaller box that si18's would require.

I have noticed everyone on the forums wants to get super low. Most of the content I hear doesn't dip below 20 and for music its almost non existent. Going bang for the buck, I think tuning to 23 is great, you get more in the upper end where that sub shines and tuning 23hz instead of 20, your only loosing .5db
@20hz
and gaining much more in the upper end. You could tune it lower but its less worthy of a choice and then you should go with a larger driver. With that said modeling 32 of those 12's @23hz tune with 16,000rms. At 20hz its going to be 134db's and go up about 10 db's quickly. Its just fun speculation as well, I may make a quad ported box with some of these, the price is right.

I'm leaning towards (80%) a few tapped horns (lilmike helping me) and some sealed smoothing subs so my main interest will be integrating them properly.

Can I use a simple minidsp to do that ? Or an inukedsp ?

I am in a similar position with regards to adding some additional subs to my new dedicated theater setup. I currently have duel full sized MartySubs with possibly two more coming down the line, but that is not a for sure thing as I may not have the space in my room for two more 2ft by 2ft by 4ft enclosures.

With that being said, I am considering two options, those being, option #1 : a quad set of Infinity 1260's in each pillar to the left and right side of the listing position, for a total of 8 of the Infinities powered by two iNuke3000's I would want to port these but am unsure what size the pillars would need to be or the best tuning frequency.

I am in a similar position with regards to adding some additional subs to my new dedicated theater setup. I currently have duel full sized MartySubs with possibly two more coming down the line, but that is not a for sure thing as I may not have the space in my room for two more 2ft by 2ft by 4ft enclosures.

With that being said, I am considering two options, those being, option #1 : a quad set of Infinity 1260's in each pillar to the left and right side of the listing position, for a total of 8 of the Infinities powered by two iNuke3000's I would want to port these but am unsure what size the pillars would need to be or the best tuning frequency.

That 23hz tune with those subs give you the best output except in that 20hz zone, above 20 its excellent and darn loud. Also in a smaller box that si18's would require.

I have noticed everyone on the forums wants to get super low. Most of the content I hear doesn't dip below 20 and for music its almost non existent. Going bang for the buck, I think tuning to 23 is great, you get more in the upper end where that sub shines and tuning 23hz instead of 20, your only loosing .5db
@20hz
and gaining much more in the upper end. You could tune it lower but its less worthy of a choice and then you should go with a larger driver. With that said modeling 32 of those 12's @23hz tune with 16,000rms. At 20hz its going to be 134db's and go up about 10 db's quickly. Its just fun speculation as well, I may make a quad ported box with some of these, the price is right.

Do this for your near field.

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"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."